RFR: 8373118: Test java/lang/Thread/virtual/Starvation.java timed out [v2]

[Doug Lea]

> Changes signal filtering to avoid possible starvation

Doug Lea has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Merge branch 'openjdk:master' into JDK-8373118
 - Address review comments
 - signalWork diagnostic
 - filter by index
 - For testing

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28797/files
  - new: https://git.openjdk.org/jdk/pull/28797/files/094d7d75..357a3cb7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28797&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28797&range=00-01

  Stats: 16878 lines in 265 files changed: 10735 ins; 4003 del; 2140 mod
  Patch: https://git.openjdk.org/jdk/pull/28797.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28797/head:pull/28797

PR: https://git.openjdk.org/jdk/pull/28797